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Windows 7: Need windows 7 back!

Nephew's computer:
Acer Aspire 5742Z-4601
Originally running win 7 - unknown as to which win 7 as the COA sticker is totally unreadable

Computer was upgraded to windows 10 under the free offer.
Apparently the computer has major issues with 10 that they have never been able to resolve. He wants to go back to win 7 but did not get any discs with the computer. My thought was to get recovery disks from acer but they are no longer available. Any suggestions?
Ron

OEM self activation only requires the slic table entries to be present on the motherboard/Bios.
(short and sweet explanation but covers your situation)
W10 does it differently and fortunately does NOT over-right it

run it on your W7 comp as well, and compare them
they will be slightly different details, but the major lines should be the same
Cached Online Validation Code: 0x0
AND
Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: 0x00000000
HealthStatus: 0x0000000000000000
Event Time Stamp: 2:6:2016 17:03
ActiveX: Registered, Version: 7.1.7600.16395

Only OEM's can self activate, theres a SLIC table introduced into/between Motherboard and Bios during assembly.
its still there unless the Bios is corrupted.
Thats why ShowkeyPlus can pull up old OS product keys.

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